Weekly environmental news, July 21-27

Researchers link wildfires, climate change [AP]
Europe heatwave sparks fear [Reuters]
Sweden aims for oil-free economy [BBC]
Arab water to cost US$100B by 2016 [Reuters]
Canada lags US on industrial pollution cuts [Reuters]
Trawling ban protects deep-sea Alaska corals [Reuters]
Power group promoting global warming skeptic [Reuters]
Drought shrinks Brazil's Iguazu waterfall [Reuters]